1698494772 has 24 divisors (see below), whose sum is σ = 4268012896. Its totient is φ = 522613728.

The previous prime is 1698494771. The next prime is 1698494801. The reversal of 1698494772 is 2774948961.

It is a happy number.

It is a super-2 number, since 2×1698494772² = 5769768981022663968, which contains 22 as substring.

It is a Smith number, since the sum of its digits (57) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1698494771) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5443738 + ... + 5444049.

Almost surely, 2^1698494772 is an apocalyptic number.

1698494772 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1698494772 is an abundant number, since it is smaller than the sum of its proper divisors (2569518124).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1698494772 is a wasteful number, since it uses less digits than its factorization.

1698494772 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10887807 (or 10887805 counting only the distinct ones).

The product of its digits is 6096384, while the sum is 57.

The square root of 1698494772 is about 41212.7986431400. The cubic root of 1698494772 is about 1193.1308400073.

The spelling of 1698494772 in words is "one billion, six hundred ninety-eight million, four hundred ninety-four thousand, seven hundred seventy-two".